| 摘要 |
PROBLEM TO BE SOLVED: To provide a dielectric filter in which a desired attenuation characteristic is obtained and further, mass-productivity is improved. SOLUTION: In a dielectric layer 2, 1/4 wavelength strip line resonators 4a-4c are disposed, a layer different from the strip line resonators is equipped with input electrode and output electrodes 5a, 5b, such that a part of the input electrode and output electrode may face a part of the strip line resonators 4a, 4b vertically, and ground electrodes 7a, 7b are disposed to face upper and lower portions of the strip line resonators 4a-4c. A lateral side ground electrode 8a connected with a ground electrode, a lateral side input electrode 6a and a lateral side output electrode 6b connected with the input electrode 5a and the output electrode 5b are provided on the lateral side of a dielectric body, and the dielectric layers are laminated and sintered to be integrated. In such a dielectric filter, intervals of the strip line resonators 4a-4c are different on an open terminal side and a short-circuit terminal side and further, electrode widths of the input electrode and the output electrode are different on the open terminal side, the lateral input electrode side and the lateral output electrode side. COPYRIGHT: (C)2004,JPO&NCIPI
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